实现登录，编写错误码，实现错误码返回json

src/main/java/com/fjy/spring/domain/Result.java

@@ -0,0 +1,34 @@
+package com.fjy.spring.domain;
+
+/**
+ * Http请求返回的最外层对象
+ */
+public class Result<T> {
+    private Integer code;
+    private String message;
+    private T data;
+
+    public Integer getCode() {
+        return code;
+    }
+
+    public void setCode(Integer code) {
+        this.code = code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public T getData() {
+        return data;
+    }
+
+    public void setData(T data) {
+        this.data = data;
+    }
+}